dotabuff.js

$(() => {
	var api_key = "040FA36AB25776E7072B0B42CAB25A20";
	$(document).keypress(e => {
		var key = e.which;
		if (key == 13) // the enter key code
		{
			$('#test').click();
			return false;
		}
	});
	$("#test").click(() => {
		var div = "<div id='info'><img alt='loading' src='https://media.giphy.com/media/y1ZBcOGOOtlpC/giphy.gif'></div>";
		$(".output").html(div);
		var input = $("input").val();
		// https/...../
		if (input.slice(-1) === '/') {
			input = input.slice(0, -1).replace(/.*\//, "");
		} else if (input.includes('/')) {
			input = input.replace(/.*\//, "");
		}

		if (isNaN(input)) {
			$.ajax({
					url: `https://cors-anywhere.herokuapp.com/https://api.steampowered.com/ISteamUser/ResolveVanityURL/v0001/?key=${api_key}&vanityurl=${input}`,
					dataType: 'json'
				})
				.done(data => {
					var id_64bit = data.response.steamid;
					if (!id_64bit) {
						$(".output").html(`Not found 4Head`);
					} else {
						var id_32bit = convert(id_64bit);
						$(".output").html(`<a href = "https://www.dotabuff.com/players/${id_32bit}">Dotabuff</a>`);
						$("a").attr("target", "_blank");

					}
				});
		} else {
			$.ajax({
					url: `https://cors-anywhere.herokuapp.com/http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key=${api_key}&steamids=${input}`,
					dataType: 'json'
				})
				.done(data => {
					if (!data.response.players[0]) {
						$(".output").html(`Not found 4Head`);
					} else {
						var id_32bit = convert(input);
						$(".output").html(`<a href = "https://www.dotabuff.com/players/${id_32bit}">Dotabuff</a>`);
						$("a").attr("target", "_blank");

					}
				});
		}
	});

	function convert(bit64) {
		var big = bigInt(bit64);
		var minus = bigInt('76561197960265728');
		var result = big.subtract(minus);
		return result.value;
	}
});